BOSTON — Though David Robertson’s salary for next year is a drawback, and Todd Frazier would have to move from third to first, the Yankees have had eyes on the White Sox duo recently.

The Yankees haven’t sent in a special scout to gauge if Robertson or Frazier is worth trading for but have monitored the pair through standard coverage. It is widely known the White Sox are interested in moving Robertson and Frazier, who also has been linked to the Red Sox.

Robertson, a former Yankees closer, could strengthen the bullpen, but the $13 million he is owed in 2018 is viewed as a large hurdle. Nevertheless, he would add depth to the late-game bullpen. He has converted 13 of 14 save chances this year and is 4-2 with a 2.78 ERA in 30 games.

Toms River, NJ, native Frazier is making $13 million this season and is a free agent after it ends.

Frazier, 31, has played 94 games at first base in his career and certainly would provide an upgrade at a position that has been a nightmare for the Yankees this season. In 80 games, Frazier is batting .210 with 16 homers and 44 RBIs.